AT27LV520-90
器件描述：512K 64K x 8 Multiplexed Addresses/ Outputs Low Voltage OTP EPROM
器件厂商：ATMEL [ATMEL Corporation]
文件大小：129.98KB，共10页
Sponsor by e络盟器件资料摘要：
1
512K (64K x 8)
Multiplexed
Addresses/
Outputs
Low Voltage
OTP EPROM
AT27LV520
Features
• 8-Bit Multiplexed Addresses/Outputs
• Fast Read Access Time - 90 ns
• Dual Voltage Range Operation
– Low-Voltage Power Supply Range, 3.0V to 3.6V, or
– Standard 5V ± 10% Supply Range
• Low Power CMOS Operation
–20 µA max. Standby for ALE = V
IH
and V
CC
= 3.6V
– 29 mW max. Active at 5 MHz for V
CC
= 3.6V
• 20-Lead TSSOP Package
• High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latchup Immunity
• Rapid
™
Programming Algorithm - 50 µs/byte (typical)
• CMOS and TTL Compatible Inputs and Outputs
– JEDEC Standard for LVTTL
• Integrated Product Identification Code
• Commercial and Industrial Temperature Range
Description
The AT27LV520 is a low-power, high-performance 524,288-bit one-time programma-
ble read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches
for the 8 lower order address bits to multiplex with the 8 data bits. This minimizes sys-
tem chip count, reduces cost, and simplifies the design of multiplexed bus systems. It
requires only one power supply in the range of 3.0V to 3.6V for normal read mode
operation, making it ideal for fast, portable systems using battery power. Any byte can
be accessed in less than 90 ns.
The AT27LV520 is available in 173 mil, 20-pin TSSOP, 300 mil, 20-pin SOIC and 28-
pin TSOP, one-time programmable (OTP) plastic packages.
Rev. 0911B-B–01/98
Pin Configurations
Pin Name Function
A8 - A15 Addresses
AD0 - AD7 Addresses/Outputs
OE /V
PP
Output Enable/V
PP
ALE Address Latch Enable
TSSOP Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A10
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
A9
A8
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
AD0
(continued)
TSOP Top View
22
23
24
25
26
27
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
A10
NC
NC
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
NC
NC
A9
A8
NC
NC
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
NC
NC
AD0
28
1
SOIC Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE/VPP
A15
A13
A11
A9
AD0
AD2
AD4
AD6
GND
VCC
ALE
A14
A12
A10
A8
AD1
AD3
AD5
AD7
512K (64K x 8)
Multiplexed
Addresses/
Outputs
Low Voltage
OTP EPROM
AT27LV520
Features
• 8-Bit Multiplexed Addresses/Outputs
• Fast Read Access Time - 90 ns
• Dual Voltage Range Operation
– Low-Voltage Power Supply Range, 3.0V to 3.6V, or
– Standard 5V ± 10% Supply Range
• Low Power CMOS Operation
–20 µA max. Standby for ALE = V
IH
and V
CC
= 3.6V
– 29 mW max. Active at 5 MHz for V
CC
= 3.6V
• 20-Lead TSSOP Package
• High Reliability CMOS Technology
– 2,000V ESD Protection
– 200 mA Latchup Immunity
• Rapid
™
Programming Algorithm - 50 µs/byte (typical)
• CMOS and TTL Compatible Inputs and Outputs
– JEDEC Standard for LVTTL
• Integrated Product Identification Code
• Commercial and Industrial Temperature Range
Description
The AT27LV520 is a low-power, high-performance 524,288-bit one-time programma-
ble read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches
for the 8 lower order address bits to multiplex with the 8 data bits. This minimizes sys-
tem chip count, reduces cost, and simplifies the design of multiplexed bus systems. It
requires only one power supply in the range of 3.0V to 3.6V for normal read mode
operation, making it ideal for fast, portable systems using battery power. Any byte can
be accessed in less than 90 ns.
The AT27LV520 is available in 173 mil, 20-pin TSSOP, 300 mil, 20-pin SOIC and 28-
pin TSOP, one-time programmable (OTP) plastic packages.
Rev. 0911B-B–01/98
Pin Configurations
Pin Name Function
A8 - A15 Addresses
AD0 - AD7 Addresses/Outputs
OE /V
PP
Output Enable/V
PP
ALE Address Latch Enable
TSSOP Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A10
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
A9
A8
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
AD0
(continued)
TSOP Top View
22
23
24
25
26
27
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
A10
NC
NC
A12
A14
ALE
VCC
OE/VPP
A15
A13
A11
NC
NC
A9
A8
NC
NC
AD1
AD3
AD5
AD7
GND
AD6
AD4
AD2
NC
NC
AD0
28
1
SOIC Top View
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE/VPP
A15
A13
A11
A9
AD0
AD2
AD4
AD6
GND
VCC
ALE
A14
A12
A10
A8
AD1
AD3
AD5
AD7